Figure 2. Effect of MP [4-(3′,3′-dimethylallyloxy)-5-methyl-6-methoxyphthalide] on the viability of HeLa cell lines. Cell viability was measured with the MTT assay. Cells were treated with 5, 10, 20, 40, and 80 μg/mL MP or with DMSO (0.05%) as the vehicle control for 24, 48 and 72 h. Results are reported as means±SD of triplicate independent experiments at each time point. *P<0.05 and **P<0.01 compared with the control group (two-tailed unpaired t-test).
